The Birds of Wyoming. 161 



563 a. Spizella pusilla arenacea Chadb. 

 Western Field Sparrow. 

 Practically nothing is known of this variety in Wyoming*. 

 The only record is one from Dr. Allen (Bull. Mus. Comp. 

 Zool., Ill, 1872, 145) in which he notes taking this bird at 

 Cheyenne. 



585 c. Passerella iliaca schistacea (Baird.). 

 Slate-colored Sparrow. 

 Probably a summer resident : but nothing is known of 

 this variety in Wyoming except the data obtained by Drexel, 

 and he remarked that they were common. It is quite probable 

 that this variety is common in the western part of the state 

 and seldom if ever reaches the eastern boundary. 



683. Icteria virens (Linn.). 

 Yellow-breasted Chat. 

 Allen reported this species from Cheyenne. Mus. Comp. 

 Zool., III., 1872. This bird is not known to occur in the state 

 and possibly it may refer to 683a. 



733 a. Parus inornatus griseus Ridgw. 

 Gray Titmouse. 

 The Wyoming record rests upon the report of Aiken. He 

 notes it as a "common winter resident, gregarious during the 

 first part of the winter, but since January seen only singly or 

 in pairs." 



